Brick for metallurgic furnaces.



W. N. MOKNIGHT & R. H. YOUNGMAN. BRICK FOB. METALLURGIG FURNACES.

APPLICATION FILED MAR. 11. 1910.

1,016,350. Patented Feb. 6,1912.

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'2 WITNESSES. mvsms ggiltf w was A L To all whom, it ma concern:

' UNITED STAT S.

WILLIAM N. MOKNIGHT AND BOBENT H. YOUNGIMAN,-OF PITTSBURGH,PENNSYLVANIA,

ASSIGNORS TO HARBISONFWALK ER REFLBACTORIES 00,, OF PITTSBURGH, PENNSYL-PATENT orrion.

VANIA, A conronsrxon or PENNSYLVANIA.

BRICK FOR METALLURGIC FURNACES.

Specification of Iietterslatent.

' Be it known it at we, WI LIAM Mc- Kmon'r and. ROBERT H. YOUNGMAN,res1- dents of Pittsburgh, in the county of AL legheny and State ofPennsylvania, have invented a new and useful Improvement in Bricks forMetallurgic Furnaces; and we do hereby declare the following to be afull, clear, and exact description thereof.

@ur invention relates to refractory brick.

. for ,metallurgic furnaces.

ill

all

I jof a material w peratures without yielding to pressure .or

7 ing of good qualitl The object of our invention is to provide a brickfor metallurgic furnaces whose body port-ion is composed of a materialwhich will resist high'temperatureswithout yielding to pressure orlosing its shape, and whose exposed side is composed of material thatwill likewise resist high temperatures and at the same time ofl'ergreater resistance to the chemical action of metals, slags,

gases, etc.

To these ends our invention COIIIPIISQS,

generally stated, a refractory brick for, met

allurgic furnaces comprising a main body portion of a refractorymaterial, and an added similar body portion of a thickness not less thanone-fourth of an inch, and

forming the exposed face of the brick of a refractory mater'iahlesssubject. to chemical action than saidmainbody portion. I

lo the accompanying drawing Figure 1. is a view of the body portion ofthe brick; Fig. 2 is a view showing the mold with the body-portion ofbrick therein; Fig. 3 is a view ofthe mold with the brick ready forburning;

finished brick. lhe brick shown in Fig. 5 of the drawing' is composed oftwo parts; the larger part or main body 2- of the brick being made ichwill resist high temits shape. For this purpose we may sing aburnedsilica brick, or the body of employ tlliev brick may beformed ofsuitable fire 9 i l" able mold 3, said mold being of such depth Thebrick-body 2 is placed ina suitthat when the brick-body Qis placedtherein the enposedsurface of the brick-bodywill' bebelow thesurface ofthemold. Aeoat plastic clay or othermaterial that will use*at-aslightly. lower temperature than the material c which the YApplication filed March 11; 1910. Serial N... 548,710.

Fig. l is a view of the bricks in a suitablekiln; and Fig. 5 is a viewofthe' brick-body is made or with which it is to be fused, is applied tothe surface of the brick-body to be faced by spreading thereon a thincoating of such material. After a coating of this character has beenapplied, the material to form the thinner portion mold and fills up thespace not occupied by the brick-body. The thickness of this thinnorportion of the, brick should be not less than one fourth of an inch, asit is to form a substantial body portion and not a mere enamel-or glazesuch as has been employed in some forms of brick. This material 4 is ofa character that will resist high temperatures, and at thesame timebetter resist the chemical action of metals, slags, gases, and suchother substances as are likely to come in contact with the exposed faceof the brick at high temperatures in metallurgic furnaces. One of thematerials possessin such qualities -is chrome ore, and sufficient wateris added to the ore to render itplas'tic, when the same is introducedinto the mold, to fill up the mold. The material 4: is then well rammedor pressed into the mold. The-brick should then be dried with a weight 6upon the upper side, and then brick should preferably bear some weightduring the burning to press the two materials together, and the heatwill fuse the rials and cause a fused joint uniting the -material 4:securely to the body of thebrick. A number of other materials may beused instead of chrome ore, for instance, burned magnesite may beemployed to form a basic lining for the brick, or the exposed aluminousproducts.

If desired, the body of the brick may be made of unburned material suchas unburned fire clay or unburned silica material, -and the portion ofchrome, magnesite or ,aluminou's' material may be added to-theunconnecti'on with adding the same to the burned brick-body.- When thismethod is adopted, the 4 unburned brick would then be burned inasuitable kilnyandthe facing magnesite is'used in connection'with asilica brick body portion the interposed fusible Patented Feb. 6,1912.

coating introduced between the'two mate burned body'of the brick, as.described, in

burned-at the same time. In cases where it of the brick is to beintroduced into the' introduced into the kiln-for burning. Each portionmay be made of aluminous clays-or fractory material, and

the brickatthe same time of coating may be omitted and a fusion obtaineddirectly between the magnesite and the brick bod by raising the brick toan extremely high temperature.'

'By our invent-ion we provide a brickbody portion which is able toresist high temperatures, and which maintains the lines of the furnaces,such as the side Walls, crowns, etc, while the smaller portion of arefractory nature, is capable of resisting disintegration or chemicalaction due to metal, slags,

gases, etc.

posed face of the brick a refractory material less sub ect to chemicalaction than the said main body-portion. 4

2, As a new article of manufacture, a refractory brick for metallurgicfurnaces, comprising a main body-portion of a refractony material, andan added smaller body portion of a thickness not less than one-fourth ofan inch and forming the exposed face of the brick united to the mainbody-portion by a fused joint.

In testimony whereof, we the said WIL- LIAM N. MCKNIGHT and ROBERT H;YOUNG- MAN, have hereunto set our hands.

WILLIAM N. McKNIGHT. ROBERT H. YOUNGMAN.

